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R. A. CHRSEBROUGH.

PROCESS OF MANUFACTURING GAS.

No. 306,810. Patented OctpZl, 1884.

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Unirse Sratrns ROBERT A. OHESEBROUGH, OF NFV YORK, N. Y.

PROCESS OF MANUFACTURING GAS.

ECIFICATION forming part of Letters Patent Efo. 306,810, dated October21, 1884.

'Application filed April -1Q, 18S-l.

.2"0 all wwnt iv' may concer/1,:

Be it lznown that I, ROBERT A. CHIESE- BROUGH, ofthe city and county ofNew York, and State of New York, have invented a new and usefulImprovement in the Manufacture ofGas, of which the following is aspecification.

Spent bone-black which has been employed in filtering vaseline,lubricating-oils, and other hydrocarbon products retains a considerablequantity of oil or hydrocarbon mattei', the quantity varying from ten tothirty per eeutum ofthe weight ofthe oil or product tiltered, accordingto the care with which the bone-black is drained. rlhe oil orhydrocarbon matter retained by the bone-black has heretofore either beenburned up, and thus destroyed and lost, in the process of revivifyingspent bone-black, or has been recovered in the form of oil bydistillation.

The object ot' my invention is to utilize the oil or hydrocarbon mattercontained in the bone-black in the manufacture of gas, and when myinvention is carried out with bonehlack which has been used forfiltering, thc boue-black will be revivilied bythe heat to which'it issubjected to convert the contained oil into gas, while, when theinvention is carried into effect with bone-black which has been a secondtime used for filtering, the removal ofthe hydrocarbon matter enhancesthe value of the spent bone-black, and it will find a more ready sale.

My invention consists in an improvement in the manufacture of gas bysubjecting boneblack charged with oil or hydrocarbon matter to a heatsufficient to vaporize the hydrocarbon matter and convert it into apermanent gas.

My invent-ion also consists in the method of utilizing the hydrocarbonmatter contained in bone-black after its being used as a filteringmaterial by subjecting` the bone-black to a heat sufficient to vaporizethe hydrocarbon and convert it into a permanent gas.

In the accompanying drawings, Figure 1 is a vertical section of anapparatus for the purpose above described. Fig. 2 is a horizontalsection thereof on the dotted line .fr Fig. l; and Fig. 3 is a verticalsection of an apparatus of modified form, also for carrying out myinvention.

(No specimens.)

Similar letters of reference designate correspending parts in theseveral figures.

Referrin first to Figs. 1 and 2, A designates a retort, which isinclosedwithin a heatingchamber, B. As here shown, the heatingchamberBis formed of brick-work c, having a may be of other form, if desired.

O designates afurnace, having the usual tire and ash-pit doors, c d, andgrate-bars e, and from this furnace the heated products of conlbustionpass into the lower part of the heating-chamber B, and rise thereinaround the retort A, the smoke finally escaping at f on the side of theheating-chamber opposite the inlet. At the top of the retort is an inletfor hone-black, snrmounted by a hopper, D, in which is arranged afeeding-cylinder, E, which may be rotated, and which is provided withribs which carry the wet oily mass of bonel black downward and into theretort continuously and uniformly. The bone-black falls upon the upperof a series of shelves or plane surfaces, g, which are inclined inopposite directions alternately, and maybe built into the retort orremovably supported upon projections t h' at the sides of the retort,the shelves in the latter case being provided with downward projectionsif, which come behind the projections h and prevent the inclined shelvesWhen made o t' IOO From the upper part of the retort A extends agas-outlet, y', and as the bone-black runs down and falls from shelf toshell" it becomes more limpid, and any oil or hydrocarbon contained init is evolved in the form of a permanent gas and esca-pes through thepipe j. No purifying` is needed, because of the action of the boneblackupon the evolved gas. The running of the bone-black down cach shelf andits fall from one shelf to another afford ample opportunity for the freeescape of the permanent gas therefrom, and it may be conducted direct tothe gas-holder.

The apparatus shown in Fig. 3 comprises a heating-chamber, B, formed bybrick-work c and a fire-brick lining, b, and within which is arrangedthe retort A, consisting, as here shown, of a spiral trunk or wormsupplied with bone-black at the upper end by a hopper, D, and rotaryfeeder E, and having its lower end continued to a sufficient distance todeliver the contents in a cool state. rlhe boneblack passing downwardthrough the retortis subjected to great heat from a furnace, C c d e,and the waste products of combustion pass away through an out-let orescape, j', at the l porizc` thelhydrocarbon matter and convertit sideof the chamber B opposite the inlet from the furnace. The gas evolvedfrom the boneblack in its downward passage passes away through the pipe7' to the gas-holder. here shown.)

It desired, other pipes likej may lead from different convolutions oi'the helical or spiral retort A', and so take thc gas oit' more freely.

(Not

I anraware that it is not new to employ bone-black as a iilteringmaterial for hydro` carbon matter or oils and to recover the hydrocarbonmatter remaining in the bone-black by subjecting the bone-black to aproce=s of distillation, whereby the hydrocarbon matter will berecovered in the form of oil. Such process l do not claim as of myinvention.

ln carrying out my invention I subject the bonel black to aheatsufficient not only to vaporize the hydrocarbon matter, but also to lxthe vapors and convert them into a permanent gas, which may be used,without further "iixing, for illuminatiner niiuoses.

That I claim as my invention, and desire to secure by Letters Patent, is

1. The improvement in the art of manufacturing gas, consistinginsubjecting bonc-black charged with oil or hydrocarbon matter to a heatsuiiicient to vaporize the hydrocarbon matter and convert it into apermanent gas, substantially as herein described.

2. The method of utilizing the hydrocarbon matter contained inbone-black ai'ter its use as a iiltering material, consisting insubjecting the bone black to a heat suiiicicnt to vainto a permanentgas, substantially as herein described.

'ROB'R A. CHESEBROUGI-'L Tit-nesses:

Louis M. F; Wurrmmiin, C. HALL.

